<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>选择器</title>
    <style>
        /*id选择器*/
        #title{
            color:orangered;
        }
    </style>
</head>
<body>
    <h2 id="title">咏鹅</h2>
    <p>鹅鹅鹅</p>
    <p>曲项向天歌</p>
    <p>白猫浮绿水</p>
    <p >红掌拨清波</p>
</body>
</html>